fix(router): capture billing country in payments request (#4347)

Author: AkshayaFoiger

crates/router/src/connector/zsl/transformers.rs

@@ -221,11 +221,7 @@ impl TryFrom<&ZslRouterData<&types::PaymentsAuthorizeRouterData>> for ZslPayment
         let family_name = item.router_data.get_optional_billing_last_name();
         let router_url = item.router_data.request.get_router_return_url()?;
         let webhook_url = item.router_data.request.get_webhook_url()?;
-        let billing_country = item.router_data.get_optional_billing_country().ok_or(
-            errors::ConnectorError::MissingRequiredField {
-                field_name: "billing.address.country",
-            },
-        )?;
+        let billing_country = item.router_data.get_billing_country()?;
 
         let lang = item
             .router_data

crates/router/src/types/transformers.rs

@@ -588,6 +588,7 @@ impl<'a> From<&'a domain::Address> for api_types::Address {
             && address.line2.is_none()
             && address.line3.is_none()
             && address.state.is_none()
+            && address.country.is_none()
             && address.zip.is_none()
             && address.first_name.is_none()
             && address.last_name.is_none()